JP2576654Y2 - Signpost - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signpost for allowing a driver or the like to recognize the alignment of a road, and more particularly to a self-luminous signpost.

[0002]

2. Description of the Related Art Conventionally used sign posts are shown in FIG. 2 or FIG. First, the one shown in FIG.
It has a structure in which a substrate 30 provided with 20 is provided. Therefore, the light from the LED 20 passes through the translucent hood 10 and is radiated to the outside.

FIG. 3 shows an incandescent light bulb 50 provided as a point light source near the center of the internal space of the translucent hood 10, and on the upper and lower surfaces of the translucent hood 10. Have a structure in which reflectors 40a and 40b for reflecting light from the incandescent lamp 50 are provided. In this conventional example, the light from the incandescent lamp 50 is transmitted through the translucent hood 10 as it is, or
After being reflected by 40b, the light passes through the translucent hood 10 and is radiated to the outside.

[0004]

By the way, in the former conventional example described above, although a large number of LEDs 20 are provided, there is a problem that visibility is poor due to lack of light quantity and lack of brightness. . On the other hand, in the latter conventional example, since it is a point light source, there is a problem that the light emitting surface is small and the visibility is also poor.

The present invention has been made in order to solve these problems, and has sufficient light quantity and high brightness so that a driver can safely and smoothly operate in a foggy or snowy area. Moreover, it is an object of the present invention to provide a sign post having a sign surface uniformly illuminated.

[0006]

In order to achieve the object of the present invention, a sign post of the present invention has a cylindrical shape having a closed upper surface and a side surface made of a translucent member. In the internal space, at least one of the side surfaces is formed of a sheet prism in which a plurality of ridges are formed on one surface of the inner surface, and the inner surface excluding the sheet prism and the open lower surface is formed of a reflective surface. A quadrangular prism body is provided, and a light source that emits light upward is provided in the vicinity of the lower surface of the square prism body, and light from this light source is directly or through a reflection surface of the quadrangular prism body surface, It is configured to be guided to the sheet-like prism and emitted to the outside as substantially horizontal light.

[0007]

The light emitted from the light source is guided to the sheet-like prism directly or through the reflecting surface of the inner surface of the rectangular prism, is separated and transmitted through each slope of each convex stripe of the prism, and is emitted as substantially horizontal light. The prism surface of the quadrangular prism emits light uniformly. Further, the substantially horizontal light from the prism is emitted through the light transmitting portion of the hood.

[0008]

FIG. 1A is a longitudinal sectional view of an embodiment of the present invention.
(B) is a horizontal cross-sectional view along XY of (a).
Hereinafter, embodiments of the present invention will be described with reference to these drawings.

[0009] The signpost of the embodiment of the present invention comprises a quadrangular prism 2, a halogen lamp 5, and a hood 1 covering them. First, the quadrangular prism 2 is formed at a position where sheet-like prisms 3a and 3b that diffuse and transmit light are opposed to each other, and the inner surface other than the sheet-like prisms 3a and 3b is formed by a reflection plate 4. And the lower part is open. Also, this prism 3
In a and 3b, a plurality of ridges are formed on one surface, and each ridge is set so that each slope is substantially horizontal.
Further, a halogen lamp 5 is provided near the open lower surface of the quadrangular prism 2.

Further, a hood 1 for covering the rectangular column 2 and the halogen lamp 5 is provided, and the hood 1 has a cylindrical shape whose upper surface is closed. The side surface of the hood 1 is constituted by a light-transmitting portion 1a made of a member having a light-transmitting property, and the upper surface is constituted by a light-shielding portion 1b made of a member having a light-shielding property.

The operation of the sign post according to the embodiment of the present invention having the above configuration will be described. As shown in FIG. 1A, the light from the halogen lamp 5 is guided to the prisms 3a, 3b directly or after reflecting off the reflector 4, and the prisms 3a, 3b
The light is split and transmitted through each slope of each convex stripe, and is emitted as substantially horizontal light, and the prism surface of the quadrangular prism 2 emits light uniformly. Further, light emitted from the prism surface is transmitted through the light transmitting portion 1a of the hood 1.
And is emitted outside.

In this embodiment, the reflector 4 is provided on the upper surface. Even when the light emitted from the halogen lamp 5 is not directly applied to the prisms 3a and 3b, the reflector 4 efficiently reflects the light. By being guided to the prisms 3a and 3b, the light transmitting portion 1a can maintain high luminance. Further, since the halogen lamp 5 is used as a light source, it becomes a signpost having excellent light quantity and luminance. Further, since only one halogen lamp 5 needs to be provided, maintenance is easy and the cost is reduced.

In this embodiment, the sheet prisms are provided in two directions. However, the sheet prisms may be provided in three or four directions, and may be provided as needed. Also,
The inner surface of the upper surface of the quadrangular prism 2 efficiently transmits light and the prism 3
It is desirable to provide a reflection plate for guiding the light to the points a and 3b.

[0014]

As described above, at least one of the side surfaces of the quadrangular prism provided in the inner space of the hood whose side surface is made of a translucent member has a plurality of ridges formed on one surface of the inner surface. The inner surface except for the sheet-shaped prism and the open lower surface is formed of a reflective surface, and a light source that emits light upward near the lower surface of the quadrangular prism body, The light from this light source is guided to the sheet-like prism directly or through a reflecting surface,
Since the light is emitted to the outside as substantially horizontal light, the light emitted from the light source is directly or efficiently reflected and guided to the prism. Further, since the light source is provided below the sheet prism, there is no obstacle such as the shadow of the light source being reflected on the hood. As a result, it is possible to obtain a signpost having a clear and uniform light-transmitting surface excellent in light quantity and luminance and having improved visibility.

[Brief description of the drawings]

FIG. 1 is a sectional view illustrating an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a conventional example.

FIG. 3 is a sectional view of a main part of another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hood 1a ... Translucent part 2 ... Square prism 3a, 3b ... Prism 4, 6a, 6b ... Reflector 5 ... Halogen lamp

Claims (1)

(57) [Scope of request for utility model registration] 1. An inner space of a hood having a cylindrical shape with an upper surface closed and having a side surface made of a translucent member, at least one of the side surfaces and a plurality of ridges on one surface of the inner surface. A quadrangular prism body made of a sheet-shaped prism formed and having an inner surface formed by a reflective surface except for the sheet-shaped prism and the open lower surface is provided, and near the lower surface of the square prism body. A light source that emits light upward is provided, and the light from the light source is guided to the sheet-like prism directly or through the reflection surface of the quadrangular prism inner surface, and is configured to be emitted to the outside as substantially horizontal light. Become a signpost.